SYSPRO and Avalara integration

What moves between them

Transactions flow from SYSPRO into Avalara. On a schedule you define, ml-connector polls SYSPRO's ArInvoice table for new sales invoices and ApInvoice for new purchase invoices via OData $filter on PostDate. For each invoice, ml-connector calls Avalara's CreateTransaction endpoint with the invoice line items, ship-to address, and tax codes, and Avalara returns the calculated tax by jurisdiction. ml-connector then either stores this determination for reporting and reconciliation, or posts the resulting tax liability and tax payable amounts into SYSPRO's GenMaster (general ledger) via the e.net Business Objects layer, allocated to the GL accounts you configure.

How ml-connector handles it

ml-connector maintains two independent credential sets: SYSPRO session token (obtained via Utilities/Logon once per day, cached and refreshed on 401) and Avalara Account ID and License Key (static). When polling SYSPRO, ml-connector constructs OData $filter queries on ArInvoice.PostDate and ApInvoice.PostDate to retrieve invoices posted since the last poll, then extracts line items, ship-to address, and line-level tax codes. For each invoice, ml-connector calls Avalara's CreateTransaction endpoint with the full line detail. Avalara's rate limits (HTTP 429) trigger exponential backoff and retry. Because Avalara's committed transactions are immutable, ml-connector uses the SYSPRO invoice number as the Avalara document code for idempotency - resubmitting the same invoice returns a DocumentCodeConflict error, which is captured and logged rather than retried. Tax liability is posted to SYSPRO via the e.net Business Objects REST layer with the same session token, allocated to GL accounts based on tax code mappings you configure. Every transaction and GL posting is audited with full request/response payloads.

A real-world example

A mid-sized distributor in the eastern United States sells directly to retail customers across multiple states. Before the integration, the finance team manually calculated tax on each invoice using jurisdiction tables, sometimes getting rates wrong or missing new tax rule changes, then re-keyed the tax amount into SYSPRO's general ledger. Month-end close required a full manual reconciliation of tax liability across all states. With SYSPRO and Avalara connected, each invoice automatically sends its line items and ship-to address to Avalara at posting time, the tax is calculated correctly across all applicable jurisdictions, and the liability posts into the GL on the same day. The team saves four days of month-end close work and no longer misses rate changes.

What you can do

• •Poll SYSPRO sales and purchase invoices on a schedule and send each to Avalara for multi-jurisdiction tax calculation.
• •Receive Avalara's calculated tax liability and payable and post them to SYSPRO's general ledger using the e.net Business Objects layer.
• •Store tax determinations in ml-connector for reconciliation and reporting against Avalara's official transaction record.
• •Handle SYSPRO session token refresh, Avalara rate limits with exponential backoff, and idempotent re-submission using invoice numbers as document codes.
• •Maintain a full audit trail of every poll, tax calculation, and GL posting with complete request and response payloads.

Questions

Which direction does data flow between SYSPRO and Avalara?

The flow is SYSPRO into Avalara. ml-connector polls SYSPRO invoices on a schedule and sends each to Avalara for tax calculation. Avalara returns the calculated tax liability by jurisdiction, which ml-connector can then post back into SYSPRO's general ledger. Avalara committed transactions are read-only, so corrections require a void-and-recreate in Avalara.

How does ml-connector handle Avalara's rate limits and immutable transactions?

ml-connector respects Avalara's HTTP 429 rate limit with exponential backoff and retry. Because committed transactions in Avalara cannot be modified, ml-connector uses SYSPRO's invoice number as the Avalara document code for idempotency - resubmitting the same invoice returns a DocumentCodeConflict, which is logged rather than retried.

How are tax amounts posted back into SYSPRO?

ml-connector uses SYSPRO's e.net Business Objects REST layer to post tax liability and payable to GenMaster (the general ledger) on the GL accounts you configure, based on tax code mapping. This requires the same SYSPRO session token used for polling invoices.